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A176661 Partial sums of A061262. 0
0, 3, 15, 36, 88, 145, 236, 357, 493, 704, 896, 1122, 1531, 1862, 2229, 2635, 3146, 3653, 4539, 5176, 5948, 6669, 7540, 8492, 9594, 10660, 11887, 13079, 14720, 16341, 17737, 19118, 20619, 22351, 24143, 26070, 28012, 30413, 33024, 35575, 37997 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Partial sums of smallest number representable as the sum of 3 triangular numbers in exactly n ways. The subsequence of triangular numbers in the partial sum begins: 3, 15, 36. The subsequence of primes in the partial sum begins: 3, 1531, 11887, 17737, 37997, 43441.

LINKS

Table of n, a(n) for n=0..40.

FORMULA

a(n) = SUM[i=0..n] A061262(i).

EXAMPLE

a(13) = 0 + 3 + 12 + 21 + 52 + 57 + 91 + 121 + 136 + 211 + 192 + 226 + 409 = 1531 is prime.

CROSSREFS

Cf. A061262, A000217, A053614, A060773, A002636, A124978.

Sequence in context: A161738 A062741 A185541 * A117561 A065765 A318738

Adjacent sequences:  A176658 A176659 A176660 * A176662 A176663 A176664

KEYWORD

nonn

AUTHOR

Jonathan Vos Post, Apr 23 2010

STATUS

approved

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Last modified July 16 23:49 EDT 2019. Contains 325092 sequences. (Running on oeis4.)