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A183528
An Ulam-type sequence: a(n) = n if n<=5; for n>5, a(n) = least number > a(n-1) which is a unique sum of 5 distinct earlier terms.
3
1, 2, 3, 4, 5, 15, 25, 26, 27, 28, 29, 35, 43, 45, 165, 171, 172, 174, 180, 181, 328, 333, 338, 339, 340, 341, 493, 499, 500, 647, 652, 657, 658, 659, 660, 661, 662, 663, 815, 818, 819, 971, 1127, 1137, 1138, 1139, 1140, 1141, 1142
OFFSET
1,2
COMMENTS
An Ulam-type sequence - see A002858 for further information.
EXAMPLE
a(6) = 15 = 1 + 2 + 3 + 4 + 5 = 5*6/2, because it is the least number >5 with a unique sum of 5 distinct earlier terms.
a(7) = 25 = 1 + 2 + 3 + 4 + 15 = 5^2, because it is the least number >15 with a unique sum of 5 distinct earlier terms.
MAPLE
# see A183534 for programs.
CROSSREFS
Column k=5 of A183534.
Sequence in context: A227535 A096774 A201356 * A145029 A145030 A242948
KEYWORD
nonn
AUTHOR
STATUS
approved