

A209835


Smallest k=>0 such that 2k+(nth average of twin prime pairs) is oblong number.


0



1, 0, 0, 1, 0, 0, 6, 0, 4, 1, 9, 3, 1, 9, 6, 6, 0, 1, 12, 15, 16, 0, 15, 0, 15, 15, 0, 16, 4, 21, 1, 24, 21, 6, 24, 18, 12, 3, 30, 15, 19, 15, 27, 21, 15, 6, 27, 15, 0, 36, 16, 10, 27, 12, 0, 9, 10, 7, 24, 15, 36, 21, 40, 37, 25, 16, 10, 9, 42, 21, 6, 34, 0, 30, 49, 34, 22, 13, 36, 30, 0
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,7


COMMENTS

Averages of twin prime pairs of the form n(n+1): 6, 12, 30, 42, 72, 240, 420, 462, 600, 1482, 1722, 2550, 2970, 3540, 4422, 8010, 10302, 17292, 19182, 20022, 23562, 24180, 27060, 31152... , multiples of 6 as stated in A002822.


LINKS

Table of n, a(n) for n=1..81.


CROSSREFS

Cf. A002378, A014574.
Sequence in context: A019766 A094830 A196878 * A298528 A021947 A073010
Adjacent sequences: A209832 A209833 A209834 * A209836 A209837 A209838


KEYWORD

nonn


AUTHOR

Gerasimov Sergey, Mar 14 2012


EXTENSIONS

Corrected by R. J. Mathar, Mar 15 2012


STATUS

approved



