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A254829 Number of length 2 1..(n+1) arrays with every leading partial sum divisible by 2, 3 or 5 1
2, 6, 10, 16, 23, 26, 35, 44, 55, 60, 75, 81, 98, 115, 135, 143, 168, 177, 204, 229, 257, 268, 301, 329, 362, 392, 427, 441, 484, 498, 539, 579, 622, 664, 713, 730, 778, 823, 874, 893, 950, 970, 1026, 1079, 1138, 1160, 1227, 1250, 1317, 1378, 1445, 1470, 1545, 1609 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 2 of A254827

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = a(n-1) +2*a(n-30) -2*a(n-31) -a(n-60) +a(n-61)

EXAMPLE

All solutions for n=4

..2....2....5....5....4....5....2....4....3....3....4....3....3....4....5....2

..4....2....4....3....5....5....1....4....2....3....2....5....1....1....1....3

CROSSREFS

Sequence in context: A294013 A183575 A096184 * A030511 A351635 A071597

Adjacent sequences:  A254826 A254827 A254828 * A254830 A254831 A254832

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 08 2015

STATUS

approved

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Last modified August 13 10:40 EDT 2022. Contains 356080 sequences. (Running on oeis4.)