A222618 Multiples of 10 that are sum of two consecutive primes.

30, 60, 90, 100, 120, 210, 240, 300, 320, 330, 340, 360, 390, 410, 450, 480, 520, 540, 600, 630, 740, 810, 840, 930, 990, 1030, 1120, 1140, 1180, 1200, 1220, 1230, 1250, 1290, 1300, 1320, 1350, 1360, 1410, 1460, 1530, 1560, 1620, 1650, 1710, 1740, 1770, 1830

Offset

1,1

Comments

a(1) = 30 = A179975(1)*10^1

a(4) = 100 = A179975(2)*10^2

a(123) = 6000 = A179975(3)*10^3

a(925) = 60000 = A179975(4)*10^4

a(7266) = 600000 = A179975(5)*10^5

a(204645) = 14000000 = A179975(6)*10^6.

Links

Table of n, a(n) for n=1..48.

Example

30 = 13 + 17, 60 = 29 + 31, 90 = 47 + 53, 100 = 47 + 53.

Mathematica

Select[(Total /@ Partition[Prime[Range[300]], 2, 1]), Mod[#, 10] < 1 &]

Prog

(PARI) p=13; forprime(q=17, 1000, s=p+q; s%10<1&&print1(s", "); p=q)

Crossrefs

Intersection of A001043 and A008592.

Cf. A179975 Least k => k*10^n is a sum of two successive primes.

Sequence in context: A365795 A074915 A073461 * A325992 A056954 A246947

Adjacent sequences: A222615 A222616 A222617 * A222619 A222620 A222621

Keyword

nonn

Author

Zak Seidov, Feb 26 2013

Status

approved