A154785 Row sums of triangle in A154724.

1, 2, 3, 12, 15, 18, 21, 40, 45, 50, 55, 84, 65, 70, 105, 80, 119, 162, 57, 140, 189, 154, 161, 264, 225, 182, 297, 196, 203, 390, 155, 352, 429, 170, 385, 468, 333, 418, 585, 360, 369, 714, 387, 396, 855, 414, 423, 720, 343, 650

Offset

1,2

Comments

Also, row sums of triangle in A154726.

Links

Nathaniel Johnston, Table of n, a(n) for n = 1..10000

Formula

a(n) = A154786(n) + n.

Maple

for n from 1 to 50 do rsum:=0: for k from 1 to 2*n-1 do if(k=n or (isprime(k) and isprime(2*n-k)))then rsum:=rsum+k:fi:od: printf("%d, ", rsum):od: # Nathaniel Johnston, Apr 19 2011

Crossrefs

Cf. A154724, A154725, A154726, A154727, A154783, A154784, A154786.

Sequence in context: A180630 A173079 A173903 * A374730 A090512 A076175

Adjacent sequences: A154782 A154783 A154784 * A154786 A154787 A154788

Keyword

easy,nonn

Author

Omar E. Pol, Jan 15 2009

Extensions

a(11)-a(50) from Nathaniel Johnston, Apr 19 2011

Status

approved