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A076621 Least square greater than the product of two successive primes. 0
9, 16, 36, 81, 144, 225, 324, 441, 676, 900, 1156, 1521, 1764, 2025, 2500, 3136, 3600, 4096, 4761, 5184, 5776, 6561, 7396, 8649, 9801, 10404, 11025, 11664, 12321, 14400, 16641, 17956, 19044, 20736, 22500, 23716, 25600, 27225, 28900, 30976, 32400 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(n) = A048761(A006094(n));

a(n) = prime(n)*prime(n+1)+((prime(n)-(prime(n+1))/2)^2 = A006094(n) + A074927(n).

LINKS

Table of n, a(n) for n=1..41.

FORMULA

For n>1: a(n) = ((prime(n)+prime(n+1))/2)^2.

MATHEMATICA

Ceiling[Sqrt[Times@@#]]^2&/@Partition[Prime[Range[50]], 2, 1] (* Harvey P. Dale, Aug 26 2013 *)

CROSSREFS

Sequence in context: A175652 A110833 A225808 * A134937 A076431 A221856

Adjacent sequences:  A076618 A076619 A076620 * A076622 A076623 A076624

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Oct 22 2002

STATUS

approved

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Last modified September 21 14:54 EDT 2020. Contains 337272 sequences. (Running on oeis4.)