A360838 - OEIS

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A360838

Numbers that are partial sums of both the even semiprimes and the odd semiprimes.

0, 62234, 199370, 180901724519001618, 277270022439043481854

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Any subsequent terms are > 10^18. - Lucas A. Brown, Mar 15 2024

LINKS

Table of n, a(n) for n=1..5.

Lucas A. Brown, Python program.

EXAMPLE

62234 = 4 + 6 + 10 + 14 + ... + 1226 (112 summands)

= 9 + 15 + 21 + 25 + ... + 779 (158 summands).

199370 = 4 + 6 + 10 + 14 + ... + 2302 (190 summands)

= 9 + 15 + 21 + 25 + ... + 1385 (284 summands).

180901724519001618 = 4 + 6 + 10 + 14 + ... + 3886621034 (95573360 summands)

= 9 + 15 + 21 + 25 + ... + 1665384631 (220558398 summands).

277270022439043481854

= 4 + 6 + 10 + 14 + ... + 165267845738 (3429906990 summands)

= 9 + 15 + 21 + 25 + ... + 68562857299 (8197644378 summands).

PROG

(Python) # See LINKS.

CROSSREFS

Cf. A046315, A100484.

Sequence in context: A089009 A093791 A083488 * A181114 A242620 A203046

Adjacent sequences: A360835 A360836 A360837 * A360839 A360840 A360841

KEYWORD

nonn,more

AUTHOR

Zak Seidov and Robert Israel, Apr 10 2023

EXTENSIONS

a(4) from Don Reble

a(5) from Martin Ehrenstein, Apr 25 2023

STATUS

approved