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A090937 Beginning with 1, relatively prime numbers with least successive difference n. a(1) =1, (a(n),a(n-1))=1, a(n)-a(n-1) >= n. 0
1, 2, 5, 9, 14, 23, 30, 41, 50, 61, 72, 85, 98, 113, 128, 145, 162, 181, 200, 221, 242, 265, 288, 313, 338 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

FORMULA

a(2n-1) = 2n^2, a(2n) = 2n^2 + 2n +1, for n > 4.

CROSSREFS

Sequence in context: A098065 A123690 A199935 * A071609 A068501 A048071

Adjacent sequences:  A090934 A090935 A090936 * A090938 A090939 A090940

KEYWORD

easy,nonn

AUTHOR

Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Dec 29 2003

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Last modified February 17 16:00 EST 2012. Contains 206050 sequences.