A100555 Smallest square that is equal to the sum of n not-necessarily-distinct primes plus 1.

1, 4, 9, 9, 9, 16, 16, 16, 25, 25, 25, 25, 25, 36, 36, 36, 36, 36, 49, 49, 49, 49, 49, 49, 49, 64, 64, 64, 64, 64, 64, 64, 81, 81, 81, 81, 81, 81, 81, 81, 81, 100, 100, 100, 100, 100, 100, 100, 100, 100, 121, 121, 121, 121, 121, 121, 121, 121, 121, 121, 121, 144, 144

Offset

0,2

Links

Table of n, a(n) for n=0..62.

Example

a(1)=4 because 2^2=1+3.
a(2)=9 because 3^2=1+3+5.
a(3)=9 because 3^2=1+2+3+3.
a(4)=9 because 3^2=1+2+2+2+2.

Crossrefs

Cf. A100498, A101776-A101778.

Sequence in context: A209674 A364821 A157300 * A250126 A186887 A140978

Adjacent sequences: A100552 A100553 A100554 * A100556 A100557 A100558

Keyword

nonn

Author

Giovanni Teofilatto, Dec 31 2004

Extensions

Corrected and extended by Ray Chandler, Jan 10 2005

Status

approved