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A055461 Square decrescendo subsequences: triangle T(n,k) = (n-k)^2, n >= 1, 0 <= k < n. 1
1, 4, 1, 9, 4, 1, 16, 9, 4, 1, 25, 16, 9, 4, 1, 36, 25, 16, 9, 4, 1, 49, 36, 25, 16, 9, 4, 1, 64, 49, 36, 25, 16, 9, 4, 1, 81, 64, 49, 36, 25, 16, 9, 4, 1, 100, 81, 64, 49, 36, 25, 16, 9, 4, 1, 121, 100, 81, 64, 49, 36, 25, 16, 9, 4, 1, 144, 121, 100, 81, 64, 49, 36, 25, 16, 9, 4, 1 (list; table; graph; refs; listen; history; internal format)
OFFSET

1,2

FORMULA

a(n) = A004736(n)^2

EXAMPLE

1; 4 1; 9 4 1; 16 9 4 1; etc.

CROSSREFS

Sequence in context: A085383 A153265 A085691 * A104796 A132020 A175643

Adjacent sequences:  A055458 A055459 A055460 * A055462 A055463 A055464

KEYWORD

easy,nonn,tabl

AUTHOR

Henry Bottomley (se16(AT)btinternet.com), Jun 26 2000

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Last modified February 15 03:33 EST 2012. Contains 205694 sequences.