

A152430


Irregular triangle read by rows, giving actual sums arising in A166709.


2



2, 2, 3, 5, 2, 3, 5, 8, 10, 2, 3, 5, 7, 8, 10, 12, 15, 17, 2, 3, 5, 7, 8, 10, 11, 12, 15, 17, 18, 23, 26, 28, 2, 3, 5, 7, 8, 10, 11, 12, 13, 15, 17, 18, 23, 24, 26, 28, 31, 36, 39, 41, 2, 3, 5, 7, 8, 10, 11, 12, 13, 15, 17, 18, 23, 24, 26, 28, 30, 31, 36, 39, 41, 48, 53, 56, 58
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OFFSET

1,1


LINKS

Rémy Sigrist, Table of n, a(n) for n = 1..10421
Rémy Sigrist, PARI program for A152430


EXAMPLE

Triangle begins:
n=1: 2
n=2: 2,3,5
n=3: 2,3,5,8,10
n=4: 2,3,5,7,8,10,12,15,17
n=5: 2,3,5,7,8,10,11,12,15,17,18,23,26,28
n=6: 2,3,5,7,8,10,11,12,13,15,17,18,23,24,26,28,31,36,39,41


PROG

(PARI) See Links section.


CROSSREFS

Cf. A166709.
Sequence in context: A256015 A138117 A175908 * A297495 A117918 A302495
Adjacent sequences: A152427 A152428 A152429 * A152431 A152432 A152433


KEYWORD

nonn,tabf


AUTHOR

N. J. A. Sloane, Oct 24 2009, following a suggestion from Rick Shepherd, Oct 18 2009


EXTENSIONS

More terms from Rémy Sigrist, Jun 24 2021


STATUS

approved



