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Digital equivalents of letters A, B, C, ..., Z on touch-tone telephone keypad.
2

%I #10 Mar 17 2015 02:15:40

%S 2,2,2,3,3,3,4,4,4,5,5,5,6,6,6,7,7,7,7,8,8,8,9,9,9,9

%N Digital equivalents of letters A, B, C, ..., Z on touch-tone telephone keypad.

%e a(3)= 2 because the third letter of the English alphabet, C, is represented by the digit 2 on telephone keypad.

%Y Cf. A079048.

%K fini,full,nonn

%O 1,1

%A _Donald S. McDonald_, Feb 01 2003