A202259 Right-truncatable nonprimes: every prefix is nonprime number.

0, 1, 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 40, 42, 44, 45, 46, 48, 49, 60, 62, 63, 64, 65, 66, 68, 69, 80, 81, 82, 84, 85, 86, 87, 88, 90, 91, 92, 93, 94, 95, 96, 98, 99, 100, 102, 104, 105, 106, 108, 120, 121, 122, 123, 124, 125, 126, 128, 129, 140, 141, 142

Offset

1,3

Comments

Supersequence of A202260, A202265. - Barry Carter, Sep 16 2016

Links

Robert Israel, Table of n, a(n) for n = 1..10000

Barry Carter, Table of n, a(n) for n=1..23498959 (bz2 compressed)

Barry Carter, Mathematica package

Maple

filter:= proc(n) option remember; not isprime(n) and procname(floor(n/10)) end proc:
for i from 0 to 9 do filter(i):= not isprime(i) od:
select(filter, [$0..1000]); # Robert Israel, Nov 01 2016

Crossrefs

Cf. A012883 (right-truncatable noncomposites), A024770 (right-truncatable primes), A202260 (right-truncatable composites).

Sequence in context: A335419 A163122 A329149 * A050655 A117098 A077136

Adjacent sequences: A202256 A202257 A202258 * A202260 A202261 A202262

Keyword

nonn,base

Author

Jaroslav Krizek, Dec 25 2011

Status

approved