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A091607 Column 4 of triangle A091602. 1
1, 0, 1, 1, 3, 3, 5, 6, 10, 12, 18, 22, 32, 39, 54, 67, 89, 110, 144, 177, 228, 280, 354, 433, 542, 659, 816, 989, 1214, 1464, 1784, 2142, 2593, 3101, 3730, 4444, 5318, 6310, 7514, 8886, 10534, 12413, 14656, 17214, 20249, 23711, 27790, 32447, 37908, 44134 (list; graph; refs; listen; history; text; internal format)
OFFSET

4,5

LINKS

Alois P. Heinz, Table of n, a(n) for n = 4..1000

FORMULA

a(n) = A035959(n) - A001935(n).

CROSSREFS

Sequence in context: A048274 A059892 A241090 * A276434 A183561 A300183

Adjacent sequences:  A091604 A091605 A091606 * A091608 A091609 A091610

KEYWORD

nonn

AUTHOR

Christian G. Bower, Jan 23 2004

STATUS

approved

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Last modified March 23 14:17 EDT 2019. Contains 321431 sequences. (Running on oeis4.)