A121947 - OEIS

This site is supported by donations to The OEIS Foundation.

A121947

Numbers that are sums of proper substrings of its reversal.

149, 198, 1392, 16041957 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	COMMENTS	`a(5) > 2*10^9. [From Donovan Johnson (donovan.johnson(AT)yahoo.com), Mar 30 2010]`
	EXAMPLE	`149 is in the sequence because 149 = 1 + 4 + 9 + 41 + 94.`
	MATHEMATICA	`Select[Table[ n, {n, 10000000}], # == Plus @@ ToExpression[ Flatten[Table[ StringTake[StringReverse[ToString[ # ]], {i, j}], {i, StringLength[ToString[ # ]]}, {j, i, StringLength[ToString[ # ]]}]]] - ToExpression[StringReverse[ToString[ # ]]] &]`
	CROSSREFS	`Sequence in context: A178127 A031929 A161487 * A141946 A128390 A142029` `Adjacent sequences: A121944 A121945 A121946 * A121948 A121949 A121950`
	KEYWORD	`base,more,nonn,bref`
	AUTHOR	`Tanya Khovanova (tanyakh(AT)yahoo.com), Sep 04 2006`
	EXTENSIONS	`a(4) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Mar 30 2010`

Content is available under The OEIS End-User License Agreement .

Last modified February 13 09:25 EST 2012. Contains 205451 sequences.