A249331 Numbers missing in A249299 = list {b(n)} of numbers such that Sum_{k=1..b(n)} b(k) is not in the list.

0, 1, 5, 9, 15, 30, 40, 51, 76, 90, 106, 123, 141, 180, 201, 223, 246, 270, 295, 321, 348, 376, 405, 436, 468, 501, 535, 606, 643, 681, 720, 761, 803, 846, 890, 935, 1028, 1076, 1125, 1175, 1227, 1280, 1334, 1389, 1445, 1502, 1619, 1679, 1740, 1802, 1865, 1929, 1994, 2060, 2127, 2195, 2264

Offset

1,3

Links

M. F. Hasler, Table of n, a(n) for n = 1..931

E. Angelini, Sum of the a(n) first terms of S is not in S, SeqFan list, Oct 2014

Prog

(PARI) A249299=[]; A249331=[s=0, 1]; for(n=2, 999, setsearch(A249331, n)&&next; A249299=concat(A249299, n); s+=n; setsearch(A249299, #A249299)&&A249331=concat(A249331, s))

Crossrefs

Sequence in context: A256343 A210289 A062516 * A345953 A075133 A351826

Adjacent sequences: A249328 A249329 A249330 * A249332 A249333 A249334

Keyword

nonn

Author

Eric Angelini and M. F. Hasler, Oct 24 2014

Status

approved