A066551 -id:A066551 - cp's OEIS frontend

A066552 Sum of digits of n-th term of A066551.

1, 13, 9, 18, 28, 5, 26, 37, 38, 34, 61, 59, 43, 58, 44, 64, 44, 59, 67, 85, 98, 89, 109, 121, 124, 144, 47, 82, 94, 104, 135, 139, 145, 103, 95, 135, 184, 162, 143, 173, 157, 151, 198, 194, 199, 218, 148, 234, 231, 261, 257, 226, 297, 169, 192, 179, 163, 195, 216

Offset: 1

Amarnath Murthy, Dec 16 2001

Cf. A066547, A066549, A066551.

With[{c=Flatten[IntegerDigits/@(Range[400]^2)]},Table[Total[Take[c,{(n(n-1))/2+1,(n(n-1))/2+n}]],{n,60}]] (* Harvey P. Dale, Jul 21 2012 *)

More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 01 2003

A066583 Product of nonzero digits of A066551(n).

Original entry on oeis.org

1, 36, 12, 360, 1728, 2, 864, 64800, 62208, 40960, 57153600, 8128512, 31104, 10497600, 184320, 31352832, 414720, 17418240, 1360488960, 54177693696, 9631589990400, 156764160000, 79009136640000, 1161434308608000, 880969431121920, 97497558401679360, 82944

Offset: 1

Amarnath Murthy, Dec 21 2001

			The third term of A066551 is 162 hence a(3) = 12.

Cf. A066551.

Corrected and extended by Lior Manor, Feb 13 2002

a(21) onward corrected by Sean A. Irvine, Oct 29 2023

cp's OEIS Frontend

A066552 Sum of digits of n-th term of A066551.

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