A159063 a(1)=0, a(n+1) is the smallest nonprime >= n^smallest digit of a(n).

0, 1, 4, 81, 4, 625, 36, 343, 512, 9, 1000000000, 1, 12, 14, 14, 15, 16, 18, 18, 20, 1, 21, 22, 529, 576, 9765625, 676, 387420489, 1, 30, 1, 32, 1024, 1, 34, 42875, 1296, 38, 54872, 1521, 40, 1, 42, 1849, 44, 4100625, 1, 48, 5308416, 1, 50, 1, 52, 2809, 1, 55

Offset

1,3

Links

Table of n, a(n) for n=1..56.

Example

0, 1(=1^0), 4(>2^1), 81(=3^4), 4(=4^1), 625(=5^4), 36(=6^2), 343(=7^3), 512(=8^3), 9(=9^1), 1000000000(=10^9), 1(=11^0), 12(=12^1), 14(>13=13^1), 14(=14^1), 15(=15^1)

Crossrefs

Cf. A000027, A141468, A156615.

Sequence in context: A203480 A339854 A116189 * A337053 A258981 A072363

Adjacent sequences: A159060 A159061 A159062 * A159064 A159065 A159066

Keyword

nonn,base

Author

Juri-Stepan Gerasimov, Mar 12 2009

Extensions

a(21) inserted and terms from a(28) on corrected by R. J. Mathar, Mar 17 2009

Status

approved